I was told at a meeting a while back by a representative of the ICO that this interpretation came from a ECJ decision about the meaning of "a month" in EU legislation. I don't recall the name of the decision being mentioned. We are sticking to 30 calendar days on the basis of certainty and consistency until we are told to change. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ All archives of messages are stored permanently and are available to the world wide web community at large at http://www.jiscmail.ac.uk/lists/data-protection.html If you wish to leave this list please send the command leave data-protection to [log in to unmask] All user commands can be found at https://www.jiscmail.ac.uk/help/subscribers/subscribercommands.html Any queries about sending or receiving messages please send to the list owner [log in to unmask] Full help Desk - please email [log in to unmask] describing your needs To receive these emails in HTML format send the command: SET data-protection HTML to [log in to unmask] (all commands go to [log in to unmask] not the list please) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^